RecyclerViewMatcher.java

/*
 * Copyright (C) 2015 Arles. All rights reserved.
 * <p/>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.arles.swissmanager.test.util;

import android.content.res.Resources;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.TextView;

import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;

/**
 * Created by Admin on 10.07.2015.
 */
public class RecyclerViewMatcher {

    private final int mRecyclerViewId;

    public RecyclerViewMatcher(int recyclerViewId) {
        mRecyclerViewId = recyclerViewId;
    }

    public Matcher<View> atPosition(final int position) {
        return atPositionOnView(position, -1);
    }

    public Matcher<View> atPositionOnView(final int position, final int targetViewId) {

        return new TypeSafeMatcher<View>() {
            Resources resources = null;
            View childView;

            public void describeTo(Description description) {
                String idDescription = Integer.toString(mRecyclerViewId);
                if (this.resources != null) {
                    try {
                        idDescription = this.resources.getResourceName(mRecyclerViewId);
                    } catch (Resources.NotFoundException var4) {
                        idDescription = String.format("%s (resource name not found)",
                                new Object[]{Integer.valueOf
                                        (mRecyclerViewId)});
                    }
                }
                description.appendText("with id: " + idDescription);
            }

            public boolean matchesSafely(View view) {
                this.resources = view.getResources();
                if (childView == null) {
                    RecyclerView recyclerView =
                            (RecyclerView) view.getRootView().findViewById(mRecyclerViewId);
                    if (recyclerView != null && recyclerView.getId() == mRecyclerViewId) {
                        childView = recyclerView.getChildAt(position);
                    } else {
                        return false;
                    }
                }
                if (targetViewId == -1) {
                    return view == childView;
                } else {
                    View targetView = childView.findViewById(targetViewId);
                    return view == targetView;
                }
            }
        };
    }

    public static Matcher<View> withRecyclerAdaptedData(final Matcher<String> dataMatcher, final int viewId) {
        return new TypeSafeMatcher<View>() {

            @Override
            public void describeTo(Description description) {
                description.appendText("Error while matching");
            }

            @Override
            public boolean matchesSafely(View view) {
                RecyclerView recyclerView = (RecyclerView) view;
                for (int i = 0; i < recyclerView.getAdapter().getItemCount(); i++) {
                    CharSequence itemText = ((TextView) recyclerView.getChildAt(i).findViewById(viewId)).getText();
                    if (dataMatcher.matches(itemText)) {
                        return true;
                    }
                }
                return false;
            }
        };

    }
}